We see here the attributed coats of arms of the Three Magi, or Wise Men who are traditionally named Kaspar, Melchior and Balthazar. Of course, we don’t really know their names and they also existed before heraldry did. In fact, some Biblical scholars question whether or not they even existed at all or are merely symbolic. We also don’t know from the Scriptures that there were three of them, only that they brought three gifts of gold, frankincense and myrrh. It is assumed, safely I think, that they each bore one gift so that there must have been three of them.
This version of their arms is nicely rendered by Marco Foppoli.